Secondary battery

A secondary battery and electrode assembly technology, which is applied in the direction of secondary batteries, secondary battery manufacturing, battery electrodes, etc., can solve the problem that tabs are easily pressed between the first pole piece and the second pole piece, and the risk of short circuit, etc. problem, to achieve the effect of reducing the occupied space, reducing the risk of short circuit, and ensuring the energy density

Active Publication Date: 2020-06-23
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, during the assembly process of the secondary battery, since the tab itself is very thin, the tab is

Method used

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0051] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", and "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; terms "Multiple" means more than two (including two); unless otherwise specified or stated, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated Ground connection, or electrical connection, or signal connection; "connectio...

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Abstract

The invention provides a secondary battery, which includes an electrode assembly, a shell and a first electrode terminal, wherein the shell is provided with an accommodating cavity, the electrode assembly is accommodated in the accommodating cavity, and the first electrode terminal is arranged in the shell; the electrode assembly comprises a first pole piece, a second pole piece and a diaphragm, and the diaphragm separates the first pole piece from the second pole piece; the first pole piece comprises a first current collector, a first active substance layer and an insulating layer; the firstcurrent collector comprises a first main body part and a first tab extending from the first main body part, at least part of the surface of the first main body part is coated with the first active substance layer, and the first tab protrudes out of the first main body part and is electrically connected with the first electrode terminal; and the insulating layer is at least partially coated on thesurface of the first tab, and the elastic modulus of the insulating layer is less than that of the first tab.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a secondary battery. Background technique [0002] The secondary battery includes an electrode assembly, a casing and electrode terminals. The electrode assembly is accommodated in the casing, and the electrode terminals are arranged on the casing. The electrode assembly includes a first pole piece, a second pole piece and a diaphragm, and the diaphragm separates the first pole piece from the second pole piece. The pole piece of the electrode assembly has a tab, and the tab is electrically connected to the electrode terminal. However, during the assembly process of the secondary battery, since the tab itself is very thin, the tab is easily pressed between the first pole piece and the second pole piece, thereby causing a risk of short circuit. Contents of the invention [0003] In view of the problems in the background technology, the purpose of the present invention is to provide a s...

Claims

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Application Information

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IPC IPC(8): H01M2/26H01M10/0525H01M10/04
CPCH01M10/0525H01M10/04H01M50/531H01M50/533H01M50/536H01M50/55H01M10/0587Y02E60/10H01M50/543H01M4/366H01M4/628
Inventor 刘会会谷慧曹警予马林
Owner CONTEMPORARY AMPEREX TECH CO
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